<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>less learn</title>
	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
	<link rel="stylesheet" href="cyd.css">
</head>
<body>
	<div class="layout">
		<div class="header">header</div>
		<div class="content">content</div>
	</div>
</body>
</html>